Carbureter for internal-combustion engines.



A. WEILANB.

CARSLIHEER FOR INTERNAL CMEUSYION ENGINES.

APPUCA'UQN FILED HB. i?, 19|?.

Patented Ang. 6, 1918.

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A. WEILAND. CAHBURETR FOR INEHNAL COMEUSTiON ENGINES.

AFPucAtmn mm ri. l1. reu,

1,274,965. Patented Aug. 6, 1918.

2 SHEETS-SHEETZ.

36: 3.9 6 Inl; 6 37 KLFRED WEILAND, OF EAQST ORANGE, NEW JERSEY.

CARBURETEB FOR INTERNAL-COMBUSTION ENGINES.

Specification of Letters Patent.

Application flied February 17, 19.17. Serial No. 149,186.

To all whom it may erinnern:

Be it known that l ALFRED WVEILAND, a. citizen of the United States, residing at last Orange, county of Essex, and State of New Jersey, have invented a certain new and useful Improvement in Carbureters for l'nternal-(iomhustion Engines, of which the tolti Wing is a specification.

The present invention relates, generally, to the supply of liquid fuel and air to the motor intake or pipe leading to the. cylinder or cylinders of an explosive engine and relates more specifically to the regulation and control of the mixture in accordance with load conditions or the demands of the motor.

lt is an object of the invention to provide means which are autorisatie-ally responsive to pressure conditions imposed by the motor during its operation and whereby such means not only regulate the explosive niixtui'e as to quantity delivered from the eariun-eter, but furthermore, definitely proportion the content of the mixture, that is to say. under certain load.conditions, the liquid 'fuel content of the mixtui'e may beincreaset as required to meet that conditi in, while at another time, the air content .nay be inereased to meet another existing condition.

lt is a further object of the invention to provide a complete unitary carbureting and fuel feeding device wherein a main fuelifeeding reservoir is employed for supplyingliquid fuel to the main jet or nozzle of the carhuretri and in addition an auxiliary reservoir 1s provided within the. same carbureter easing and serves to automatically replenish at intervals the supply in the main' reservoir and furthersnore the said auxiliary mervoir acts automatically to refill itself from a low ieyei liquid fuel sup ily. y For the purpose o illust-ratinp,r my invention, I have shown in the accompanying drawings one form thereof which is at present preferred by me, since the same has been found in practice to give satisfactory and reliable results. although it is to be understood that thr.` 'various instrninentalities of which my invention consists eau be variously arranged and organized and that my invention is not limitedto the precise arrangement and organization ot the histruinentali ties as herein shown and described,

Referring to the drawings:

Figure 1 represents a sectional elevation of a carbureter embodying my invention.

Fig. 2 represents a plan of the same.

Fig. 3 represents a section on line 3--3 of Fig. 1',

Fig. i represents a section on line 4 4 of Fig. 1.

l designates the main casing of the carbureter which is substantially centrally apertured to form the carbureting chamber 2 and is additionally cored out to forni the annular main fuel reservoir 3 the storing reservoir 4 and the auxiliary reservoir 5. ln the present instance, the easing 1 is provided with a` plurality of depending webs 6 preterahl y three in number and connected for a portion 'of their length with an annular body 7, the upper part of which is suitably spaced from the bottom portion of the casing proper `to provide air passages 8 which form the main air supply to the carbureting conduit 2,

9 designates a tubular noz'zle suitably secured to the casing 1 and ext/ending axially into theearbureting chamber 2y and having its bore 10 in open communication with the said chamber 2 while its opposite end is in communication with a conduit 11 having free unobstructed communication with the main fuel reservoir 3. The bore '10 also communicates with suitable ports 12 which are in communication with an air inlet pipe 13 which permits a small primary supply of air to mix with the liquid fuel within' the nozzle. t). A pressure regulated valve 14 extends through the bore '10 and `is to control the, liquid fuelfroln the passage 11 as conditions warrant and this valve is under theI direct control of certain devices hereinafter' to he described'. Referringnow to the auxiliary chamber 5, it will heV -noted that-it receives liquid fuel by way ofthe inlet passage lwvhieh has eom-xmnieution with a suitable source ot' supply, such as a low level tank or otherwise and whiolrpassag"` 15 ii controlled by a valve.- 16 located in the path ot movcuwnt of the float 17 This float is suitably pivoted atl 18 ,for :swinging movement under change oi?y level eonditionsl und has an extension arinll) which is connected to a reciprocable valve stem 20 Patented Aug. 6, 1918.

employed uns which carries the valve 21. The valve 21 is arranged and serves to control the outlet 22 from the chamber 5 and it will he evident, from the foregoing constructionl that when the valve 2l is closed the valve 16 must be opened, so that in one instance the chamber 5 is filling and in the other it is discharging. Furthermore, the chamber 5 is normally subject to vacuum conditions, since it has communication by way of the ports 23 and 24 with the loutlet 2.7 of the carbureting chamber 2, this outlet, as will be understood, being on the-motor side of the throttle 26. The throttle is under control of the throttle lever 27 as usual.

The Storin reservoir 4 is formed as an annular cham er between the main reservoir 3 and the auxiliar)J reservoir 5 a d has a downwardly extending flange 8 which formsl a discharge passage 29, the mouth of which, under normal conditions of operation, is sealed by the liquid fuel in the main reservoir 3. This latter reservoir is provided with an air vent 30 which allowsi air to enter the said main reservoir to permit the' liquid fuel to flow to the nozzlr` and to also allow 'air to find its way through the liquid seal into the storage chamber 4, so that the liquid fuel therein may discharge in re uired amounts. i

Re erring,r now to the automatic regulation and proportioning of the liquid fuel and the air, l31 designates a valve ol"` the sliding Vsleeve type which is adapted to control 'the air openings 8 and which is novided with extensions 32 which joina ollowcr valve 33 which is closed at one end by the head 34 and guided bythe tubular extension 35 which Slides upon the nozzlemcmber 9. It will ho understood that the valve 'extensions 32 are spaced apart, as shown in Fig. 3, so that the airenteringr by way of the passages 8 and traveling :over the body 7 may pass through into the sleeve 31 and thence to the chamber 2. The sleeve valvelhas a posit'ive connection, such as shown at 36, with the 'needlefval've '14' and'consequently lany fmovei''l'nt ofthe sleeve valve Lto regulate the fair4 suppl.' will' correspondingly cause' a'regulationo V.the main'fuelsupply." NorA l'nally,4tlie valve 314 is heldfin its open posi"- non by u1e gcti0n tf1-the coiled Sp1-ing rw, the tendenicy'nf 'which is to press the valve upwardly as shown in F i`g`.`1. f

Referring now to the mfans for moving the valve Bland its associated parts in the opposite direction, 38 designates a pipe terminatin at one end adjacent the inlet end of the carbureting chamber and communicating'withthe inclosed space. formed by the valve 33, by way of the port 39. The opposite end of the pipe 38 communicateswith a relatively small chamber 40 which alito communicates with thefaforesaid ports 23 and 24. A piston 41 is mounted for sliding 65 movement within this chamber 40 and carries a valve 42 for the purpose of controlling thepassage 2H, though this latter is not in tended to be entirely cut' ol' at any time from pressure conditions in the chamber 40 and 70 therefore the valve 42 has a port 425 as a means ot' communication between the two chambers. 'A coiled springr 44 serves as a means to normally press the piston 41 in a direction necessary to maintain the valve 42 75 open while a cap 45 seals the end of the chamber 40 and also limits the movement of the piston.

In the operation of the carburetei.',"the main jet nozzle I9 receives its liquid fuel '5C from the reservoir 3 and also a primary supply of air by way of the tube 13, though the main body of air enters the carbureting chamber 2 by way of the openin s H bctween the legs or extensions 32 of t 1e valve Si' 31. The main fuel reservoir 3 continues to supply liquid fuel to the nozzle while air in the meantime finds its way around the liquid seal opening ofthe flange 28 and bubbles into the storage reservoir 4 as the stored 90 liquid fuel gradually feedsfinto the main reservoir. 1While this fuel is being used up by vthe nozzle, the auxiliary reservoir- 5 is bein y replenished through the vacuum built up Jy the suction from the intake and through the ports` 23 and 24J As soon as the liquid in the chamber reaches a definite level, the rise of the'lloat 17 closes the valve 16 and opens the valve 21, and since at this time the liquid in chamber 4 has dropped its 100 level below the outlet 22,- thereeis an outlet then provided for the air trapped. in the chamber 4, with the result that 'the liquid in the auxiliary chamber 5 discharges into the storage reservoir until the float acts to close the valve 22.

Under normal conditions, with the throttle wide open the'lslide valve 31 is held open by the action of the spring 37 and consequently the full' air inlet opening is pro- 1.10 vided to themixing cham rf" Under other conditionsfhowever, with 'themain throttle closedor partially closed and under which conditions a 'q'uite'diterent mixture is required, there will be a considerably increased y vacuum in the'small regulating chamber 40 which'produces sufficient suction below the valve 33 toovercome the action of the spring' 37 so that the valve 31 for, the air and the valve 14 for the liquid fuelare both brought 120 to a. more nearly closed position, thus cutting down not only the air butthe liquid fuel and this cutting down or diminishing of the supply may be definitely proportioned by varying the' relative dimensions' of the 1.26 aforesaid valves and parts. It' will be. hnderstotxl that the action and operation vof controlling the vulve 31 from, pressure conditions existing, in the motor intake isl quite distinct and separate from the operation of the dash-pot plunger valve 41 and I have merely illustrated the pipe 3R as connected to the chamber 40 for convenience, since it Will be understood that any suitable manner of transmitting the pressure conditions in the motor intake below the valve member 34 may be employed.

In connection with thc maintenance of a vacuuln in the auxiliarv chamber 5, it should be noted that the function `of the daslrpot valve 41 is to vary theI opening or size of the passage lending from the auxiliary chamber 5 to the` motor intake and thus regulate the suction in such a manner that the vacuum in the chamber 5 remains substantially constant. Thus, for example, as shown in Fig. 1, where the valve 4l is closed, except for the port 43, it will be evident that conditions of a maximum suction exist in the mot/o1' intake and consequently the communicating opening with the chamber 5 is at a minimum, with the result that the vacuum in the chamber 5 remains practically unchanged Naturally, as the suction in the motor intake becomes less under free running conditions, the valve 41 opens in a propor-- tionate degree and thus varies the opening as required.

It will now be apparent that I have dc vised a novel and useful construction which embodies the features of advantage enumerated as desirable in thc statement of the invention and the above description and while I have in the present instance shown and described the preferred embodiment thereof which 'has been found in practice to give satisfactory and reliable results, it is to be understood that the same is susceptible of modifications in various particulars Without departing,r from the fair spirit or scope of the invention or sacrificing any qf lts advantages.

'hat I claim is:

1. In a carbureter, a main fuel reservoir having an Nair vent above the normal liquid level', a storting reservoir having an utlet below the normal level in said main eservoir forming a liquid seahan auxiliary reservoir' having an outlet to said storing reservoir, a valve for said `auxiliary reservoir t outlet, a fuel inlet to said auxiliary reservoir, a valve controlling said lnlet, a float in said auxiliary reservoir arranged to actu-K ate both of said valves, and a conduit forming a communication between the auxiliary reservoir and a source of suction whereby a condition of vacuum is maintained in said auxiliary reservoir.

2, In a carburetor` a casing forming a car buretin chamber` a main fue'l reservoir and an auxiliary supplyreservoir. a fuel nozzle arranged to deliver fuel to said carburetiug and, an auxiliary supply reservoir, a fuel nozzle arranged to deliver fuel to said carbureting chamber and having communica tion' with said main reservoir. means c ontrolled by the liquid level in said auxiliary reservoir for alternately connecting Said auxiliary reservoir with a source of low level liquid supply and with said main reservoir, and means controlled by pressure conditions in the motor intake for maintaining a substantially constant vacuum in said auxiliary reservoir.

4. -'In a carburetor, a casin forming a car-bursting chamber, a main `ucl reservoir and an auxiliary supply' reservoir, a fuel nozzle arranged to deliver fuel to said carbureting chamber and having communication with said main reservoir, means controlled by the liquid level in said auxiliary reservoir for alternately connecting said auxiliary reservoir with a source of low level liquid supply and with said main reservoir, a conduit forming a communication between said auxiliary reservoir and the motor intake to establish vacuum conditions in said auxiliary reservoir and means to automatically vary the size of said conduit` whereby the vacuum conditions in said auxiliary reservoir remain. substantially constant.

5. In a carburetor, a casin forming a, carbureting chamber, a main nel reservoir and an auxiliaiiy supply reservoir, a fuel nozzle arrangcdto deliver fue-l to said carburetingr chamber and having communicaal` tion with sadmain reservoir, means con a port. therethrough to 'always maintain communication between said auxiliary reservoir and said motor intake, Aand means controlled by pressure conditions in said motor intake. for varying the position of said valve. l i

t5. In a fuel feeding device for 4carburctcrs, an auxiliary receptacle for liquid fuel having communication with' a lovl7 level liquid fuel supply, a reservoir for supplying liquid fuelA to a, ourburetin chamber, ,means to automatically replenisi the fuel reservoir from said auxiliary receptacle, means to normally sub'evt Seial receptacle to vacuum conditions mul means controlled by liu'essure :conditions in the motor intake for Inaintainln said vacuum in said receptacle substantial y ning,r conditions- 7. In a fuel feeding device for carbureters, an auxiliary receptacle for liquid fuel having communication with a low level liquid fue] supply, a reservoir for supplying liquid fuel to a earbureting chamber, means to automatically replenish the fuel reservoir from said auxiliary rceptacle, means to normally subject Said receptacle to vacuum conditions, and means embodying a valve dash-pot controlled by pressure wnilitions in the motor intake for maintaining said Yaouuni in said receptacle substantially con-- slant under all motor operating conditions.

8. In a carhureter, a main fuel reservoir having an air vent, a storing reservoir provided with an outlet communicating with. said' main reservoir and positioned to be liquid sealed and unsealed by the contents of said main reservoir, an auxiliary resetu voir having an outlet to said storing reiser- 'voir, *and an inlet from' a liquid fuel supply, ineens controlled by levell conditions for opemng and closing said auxiliary reservoir constant under all motor runinlet and outlet and means to automatieally 'replenish Said auxiliary reservoir from a lou7 level source.

9'. In u earburjeter, a main fuel reservoir having an air vent, a. storing reservoir pro vided with an outlet communicating with said main reservoir and positioned to be liquid sealed and. unsealed hy the contents of said main reservoir, an auxiliary reservoir having an outlet positioned lo be liquid Sealed and unsealed hy the contents of said storing reservoir and means controlled by level conditions for rendering said. auxiliary reservoir outlet operative or inoperative to the liquid sealing means according to conditions.

10. In a carlmreter, a main fuel remrvoir having an air vent, a storing' reservoir im vided with an outlet communiwiiingg with Said main reservoir and ptrsiiionwl lo he liquid sealed and unsealed by the emiliani@ of said main reservoir. an aufiiliar'y raser voir having an outlet positioruffl lo he liquid'` sealed and unsealed hy the montent@ of said storing reservoir, means rontrolleei by level conditions for rendering said auxiliary res ervoir outlet operativo or inoperative to the liquid sealingmans according to condi tions, and means to continuously maintain said auxiliary reservoir in communication with the motor intake.

In testimony whereof, I have hereunto signed my name, I

` ALFRED WEILAND. 

